After exiting the train, the dispute continued onto an escalator at the Sutphin Boulevard /Archer Avenue /JFK Airport station, and Saint-Fleur slashed both victims in the left elbow with a knife.

A third person, Andres Nova, 42, was also injured, with lacerations to his left elbow and a back injury, but it wasn’t clear if the elbow injury was from the knife or when he fell during the incident, according to the MTA.

The victims were taken to Jamaica Hospital with non-life threatening injuries, said the NYPD.

The suspect, who may be emotionally disturbed, was arrested at the scene by MTA police.